Loader selection principle:
??1. Model selection: it is mainly selected and determined according to the operation occasion and purpose. Generally working in quarries and soft bases, crawler loaders are often used;
??2. Power selection: the diesel engine of construction machinery is generally used, and the special plateau diesel engine is used for working in special areas, such as more than 3000 meters above sea level;
??3. Selection of transmission type: hydraulic mechanical transmission is generally selected. The key component is the selection of the form of torque converter. The loaders produced in China mostly use double turbine single-stage two-phase liquid torque converter.
??4. When selecting the loader, the braking performance of the loader shall also be fully considered, including multiple brakes, parking brakes and emergency brakes. There are three types of brakes: shoe type, caliper type and wet multi plate. The driving mechanism of the brake generally adopts the force adding device, and its power source includes compressed air, air top oil and hydraulic pressure. Commonly used is the air top oil braking system, which generally adopts the double circuit braking system to improve driving safety.
